1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-generator-function-definitions
es6id: 14.4
description: YieldExpression may be followed by a TemplateMiddle construct
info: |
The syntactic context immediately following yield requires use of the
InputElementRegExpOrTemplateTail lexical goal.
features: [generators]
---*/
var complete = false;
var iter, iterResult, str;
function* g() {
str = `1${ yield }3${ 4 }5`;
complete = true;
}
iter = g();
assert.sameValue(complete, false, 'generator initially paused');
assert.sameValue(str, undefined, 'first statement not executed');
iterResult = iter.next();
assert.sameValue(complete, false, 'generator paused following expression');
assert.sameValue(str, undefined, 'first statement not executed');
assert.sameValue(iterResult.done, false, 'iteration not complete');
assert.sameValue(iterResult.value, undefined, 'first iterated value');
iterResult = iter.next(2);
assert.sameValue(str, '12345', 'YieldExpression value');
assert.sameValue(complete, true, 'generator correctly re-started');
assert.sameValue(iterResult.done, true, 'iteration complete');
assert.sameValue(iterResult.value, undefined, 'second iterated value');
|
